package com.zou.practice.aspect;

import org.springframework.core.MethodParameter;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.server.ServerHttpRequest;
import org.springframework.http.server.ServerHttpResponse;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

/**
 * 统一拦截rest接口处理
 *
 * @author zouyaowen
 * @date 2020-08-18
 */
@RestControllerAdvice(annotations = {RestController.class})
public class ResponseAdvice implements ResponseBodyAdvice<Object> {

    @Override
    public boolean supports(MethodParameter methodParameter, Class<? extends HttpMessageConverter<?>> aClass) {
        return true;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter methodParameter, MediaType mediaType, Class<? extends HttpMessageConverter<?>> aClass,
                                  ServerHttpRequest request, ServerHttpResponse response) {
        // 统一返回值类型处理
        if (null == body) {
            return CommonResponse.success();
        } else if (body instanceof CommonResponse) {
            return body;
        } else {
            CommonResponse<Object> res = CommonResponse.success();
            res.setData(body);
            return res;
        }
    }
}
